We have been handling the import and export of mineral and special equipment for many years. And we would like to recommend our main product, the high-grade pyrite lumps S45 to you. The quality and the size are as follows: Pyrite Lumps S45FeS2)Quality:S: 45% minFe: 40% minSiO2: 5.0% maxPb + Zn: 0.4% maxMoisture: 1.0% maxSize:5-15mm; 10-50mm